Sash-lock



G. J. METZGER. -Sash-Look.

Patented May 11, 1880.A

pag.15

.Z7 f1 'Y ,E y fj .PETER8, PHOTO-UTHOGRAPHER, WASHINGTON, D. C.

NITED STATES PATENT OFFICE.

GEORGE J. METZGER, OF BUFFALO, NEW YORK.

SASH-LOC K.

SPECIFICATION forming part of Letters Patent No. 227,562, dated May 11, 1880.

' Application filed September 18, 1879.

To all whom it may concern:

Be it known that I, GEORGE 'J MET'ZGER, of the city of Buffalo, in the county of Erie and State of New York, have invented new and useful Improvements in Sash-Locks, of which the following is a specification, reference being had to the accompanying drawings.

This inventionfrelates more particularly to a sash-lock which'is designed to be used with sash which is required to be securely locked when in a closedor partly'open position.

In insane-asyluins and similar institutions where it is desired'to securely confine the inmates without protecting the windows by bars, it is necessary that the window-sash should be firmly locked when closed but it is at the same time desirable that the inmates should be able to open the sash at desire for the purpose of ventilation, but not so far that the inmates could escape.

My invention has for its object to produce a sashlock which will securely lock the sash either in a closed or partly open position, and which will permit the sash to be fully opened when desired.

My invention consists of a window-sash provided with a recess having an inclined face and a recess having an abrupt face, combined with a'sash-lock having its locking-.bolt operated by a peculiarlyconstructed pawl and locking mechanism, whereby the sash can be locked in a closed position, or in a partly open position, or permitted to be fully opened 5 also, of various details of construction, as will be hereinafter fully set forth.

In the accompanying drawings, Figure 1 is a partly sectional elevation of a window provided with my improved sash-lock. Fig. 2 is an elevation ofthe locklon an enlarged scale, showing the pawl in the position in which it prevents the locking-bolt from being pushed back and in which the sash is locked in a closed position. Fig. 3 is a similar view, showing the dog in the position in which the lockingfbolt can be pushed back and the sash be partly raised. Fig. et is a similar view, showing the dog in the position in which the lock-,

ing-bolt is withdrawn and the sash permitted to be fully opened. Fig. 5 is a vertical section of the lock. Fig. 6 is a top-plan view thereof. Fig. 7 is a horizontal section inline w x, Fig. 1, onan enlarged scale. Fig. 8 is a view of the key. Fig. 9 is an end'view of the recesses in the sash on an enlarged scale. Fig. 10 represents a modified construction of the lock.

Like letters of reference designate like parts in the several figures.

A A represent the jainbs of the windowframe, B the upper sash, and C the lower sash. D is the case of the lock, which is lnortised into the jamb between the stops which .form the groove in which the sash slides up and down. The lock for the lower sash is arranged near the upper end of the sash, and the lock for the upper sash near the lower end of the sash, so that both are within convenient reach.

E is the locking-bolt, sliding horizontally between ribs e on the lock-case, and provided with a suitable spring, f, which throws the bolt forward. The bolt of the lower lock is provided with a square shoulder facing downward, and an inclined shoulder facing upward, and the arrangement of the shoulders is the reverse on the bolt of the upper lock.

The sash is provided on the side which is contiguous to the lock with two recesses, Gr and H, in which the bolt may engage. The recess G is so arranged that the boltE engages in it when the sash is closed, and it is provided with an inclined shoulder, g, facing the square shoulder of the bolt, so that by raising the sash the inclined face g of the recess will force the -bolt back and out of the recess.-

The recess H is provided with a square shoulder, h, facing the square shoulder of the bolt, so that when the bolt is engaged in the recess H the bolt cannot be forced out of the recess by applying an upward pressure to the lower sash or a downward pressure to the upper sash. The recess H is so arranged on the sash'that the latter has been opened to thel desired or permissible extent when the recess H faces the bolt.

I is the tumbler or pawl whereby the locking-bolt E is controlled. This tumbler is secured to a spindle, t', by a set-screw, j, and is provided on one side of the spindle with a stop or square shoulder, k, and on the opposite side with an actuati n g-iin ger, l. The bolt E is provided at its inner end with a projecting arm or finger, m, which is engaged -by the tumbler I.

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When the tumbler I is held in the position shown in Fig. 2, with its stop k bearing against the arm m of the bolt E, the latter cannot be pushed back, and the sash is locked. When the tumbler I is given a quarter-turn, so as to remove the stop 7- out of the path of the arm m., as shown in Fig. 3, the bolt E is held by the spring f only, and can be readily pushed back, and by continuing the movement of the tumbler I in the same direction the bolt E is pushed back, as shown in Fig. 4, when the sash can be freely moved up and down.

The Spindler' is provided at its outer end with a device whereby the tumbler I is held in the desired position. As shown in the drawings, this device consists ot a cylindrical lock, N, surrounding the spindle and mortised into thc jamb of the window frame. The lock N is provided with a sliding tumbler, o, which is pressed forward by a spring, p, in the usual manner. The cylindrical case of' the lock N is provided with a circular slot, q, which permits the spindle t' to be turned when the tumbler o is pushed back.

o' is a recess arranged at the end of the slot q for the reception ot' the tumbler 0 when the pawl I is in the position in which it prevents the bolt E from being pushed back, as shown in Fig. 2. i" is a similar recess, arranged ata quarter-turn from the recess i, for holding the tumbler 0 when the pawl I is arrangedin the position in which it is simply latched, as shown in Fig. 3. That portion ot' the circular slot q which extends beyond the recess r receives the tumbler o when the bolt is drawn back, as shown in Fig. 4.

S is the key, of any ordinary and suitable pattern, which is inserted into the slotted end of the spindle t for pushing back the tumbler o and turning the spindle. In insane-asylums this key will be in the charge of the attendant, who, by simply turning the spindle t', can place the pawl I in any of the three positions specified, so as to either lock the sashor leave it optional with the inmates to partly open the sash or open the sash entirely. rIhe latter can only be accomplished as long as the pawl l is held in the position shown in Fig. 4. Upon withdrawing the key the bolt will be protracted by the spring, thereby preventing the sash from being inadvertently left unlocked.

When it is desired to use this sash-lock in dwelling-houses the key may be dispensed with and the tumbler o be provided with a knob which projects through the face of the lock and covers the outer end of the spindle, as shown in Fig. l0. In this case the circular slot q is preferably provided with a third recess for the tumbler o to engage in when the pawl I is in the position shown in Fig. 4, thereby lookin g the bolt E back and permitting the sash to be raised and lowered at deslre.

tis a vertical groove formed in the side of the sash opposite to that on which the lock is arranged.

u represents one or more tongues secured to the inner side of the window-trai1ie and projecting into the groove t. Y

By the locking-bolt E on one side and the tongue t on the other side the sash is firmly secured within the window-frame, and if the inmates should succeed in removing the stops on the inner side of the sash they could not remove the sash from the frame on account of the tongue and bolt.

I claim as my invention- 1. The combination, with a window-sash constructed with a recess, G, having an inclined face, and a recess, H, having an abrupt face, of a sashlock provided with a lockingbolt, E, operated by a pawl, I, and locking mechanism N, whereby the bolt can beloclred in a protracted position, or be permitted to be pressed back by the inclined face of the recess G, or be, withdrawn and the sash be locked in a closed position, or be permitted to be partly opened, or be entirely released, substantially as set forth.

2. In a sash-lock, the combination, with the locking-bolt E and pawl I, provided with stop It and tinger I., of a looking device, N, provided with groove q and notches i' i", whereby the pawl l is held in three different positions, in which the sash is locked in a closed position, or locked in a partly-open position, or enabled to be fully raised or lowered, substantially as set forth.

3. The combination, with the locking-bolt E, provided with projecting arm m, of the pawl I, having a stop or shoulder, 7c, and an actuatii'ig-iinger, Z, substantially as set forth.

lGEO. J. MEIZGER.

Witnesses:

`J No. J. BoNNER, Enw. J. BRADY.

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